Pattern-change mechanism for knitting machines



Feb. 2,1926. 1,571,765

w. FELS PATTERN CHANGE MECHANISM FOR KNITTING MACHINES Original Fi u y 8. 1920 1:5 sheets-Sheet 1 Feb. 2 1926".

W. FELS PATTERN CHANGE MECHANISM FOR KNITTING MACHINES inal Filed July 8. 1920 13- Sheets-Sheet 2 Feb. 2, 1926. I 1,571,765

W. FELS PATTERN CHANGE MECHANISM FOR KNITTING MACHINES Original Filed y 8, 1920 13 Sheets-Sheet s Feb. 2 1926. 1,571,765

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Feb. 2 1926.

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Feb. 2 1926. 1,571,765

W. FELS PATTERN CHANGE MECHANISM FOR KNITTING MACHINES Original Filfid y 8, 1920 16 Sheets-Sht 10 Feb. 2 1926.

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w. F ELS PA' rTERN CHANGE MECHANISM FOR KNITTING mamas Feb. 2, 1926.

Original Filed y 8. 1920 13 sheetsshet 12 Feb. 2 1926.

W. FELS PATTERN CHANGE MECHANISM 'FOR KNITTING MACHINES l3 Sheets-Sheet 15 Original Filed July 8, 1920 Pmaa Feb. 2, 1920'.

' UNITED STATES .WILLIAM EELS, ELIZABETH, NEW JERSEY, ASSIGNOB 1'0 m masons, OI ELIZABETH, NEW JERSEY.

PATTEBIi-GEANGE MECHANISM FOR KNITTING MACHINES.

Application filed July 8, 1820, Serial No. 894,878. Benewed September 10, 1985.

To all whom it may concern. Be it known that I, WILLIAM FnLs, a citizen of Austria, residing in Elizabeth, county of Union, and State of New Jersey, have 5 invented an Improvement in Pattern- Chan e Mechanism for Knitting Machines, of WhlCh the following is a speclfication.

The present inventlon relates to an imrovement in knitting machines. One obect has been to provide a machine which shall be fully automatic and at the same time of relatively sim le construction with a minimum of mec anically controlled and actuated parts. A further object has been to provide relatively simple means for preventing injury to the machine in case of careless or erroneous operation.

It is known that knitting machines, automatic in varying degrees, have been devised but these machlnes are usually of complicated desi and involve a multiplicity of mechanical rhovements which not only make the machine expensive to manufacture, but also cause frequent breakdowns and make it necessary for the operator to devote considerable attention to repairs and adjustments. According to the present invention, I utilize substantially the well known framework and opposed front and rear needle so beds of a flat links links machine, although I do not intend to limit the application of the present invention to machines of th1s type, it being contemplated that the same or similar principles of o eraion may be applied to other types 0 knitting machines with suitable modifications. In connection with the flat double bed machine, I use stitch forming means including a reciprocating carriage automatically reversible in direc- 40 tion and which carries with it suitable means for'efle cting changes in the positions of the jack actuatin cams to produce corresponding changes 1n the stitch len h, also cam positioning means for controlhn the action of the needle jacks to produce either flat or links links operation according to a predetermined order, and also means for engaging and disengaging a plurality of thread carriers to vary the color scheme of the fabric according to a predetermined arrangement. Cooperating more particularly with the links to fiat change portion of the mechanism arranged on the carriage, is a jack enarrangement of the jacquard and 0 ga ng device for automatically selecting ac s or combinations of jacks and moving them into and out of operative ositi on. TlllS device may conveniently 'be re erred to as a Jacquard and is intended to erform automatlcally, and without stopplng the machme, substantially the same functions which are now commonly performed only by hand in the case of knitted fabrics of comphcated design.

Further elasticity in the operation of the machine and 1n the character of the fabric produced 1s permitted by the provision of racking mechanism arran ed to operate only 1n 0011]}1110131011 with or en sequent to a predetermined arrangement of the jacks and needles, sald arrangement and said racking being effected automatically and without stopplng the machine.

Itis contemplated that all or part of the functlons or operations hereinabove referred to and relating to pattern variation may be controlled automatically and by electrical means through the instrumentality of a suitable pattern chart having perforations arranged in the path of contacts, said contacts formmg part of electrlcal circuits connected with and controlling the operation of various change mechanisms of the machine. Thus, the chart may be rotated around the periphery of a drum in such a way that perforations will occur in predetermined relative positions in the path of the contacts and at the proper tlme to effect corresponding changes in the operation of the machine and thus in the pattern of the fabric.

One embodiment of my invention is illustrated in the drawings accompanying the present specification, and in which-' Flgure 1 is a front elevation,

Figure 2, a rear elevation, j

Figure 3, a top plan view,

Figure 4, an end elevation showing the driving motor, I

Figure 5, a transverse vertical section on the line 5 --5 of Figure 3,

Figure 6, an end elevation showing the the electrical pattern control chart,

Figure 7, a diagrammatic representation of a portion of the electrical pattern control system,

Figure 8, a. diagrammatic representation of a further portion of the electrical pattern control system more particularly related to the operation of the jacquard.

Figure 9, a detail fragmentary view of the pattern controlchart and cooperating contacts Figure 10, a detail view partly in vertical section ofthe pattern control chart and contact making and breaking mechanism associated therewith,

Figure 11, a top View of the contact making and breaking mechanism associated with the attern control chart,

Figure 12, a top plan view show ng details of jacquard positioning mechanism,

Figure 13, a side elevation of the same,

Fi ure 14, a transverse vertical section on the line 14-14 of Figure 12.

Figure 15, a top plan view of the jacquard actuating mechanism and safety devices associated therewith,

Figure 16, a rear/view of the same,

F i 'ure 1.7, a transverse vertical section on the line 17-17 of Figure 15,

Figure 18, a top plan view of the reciproeating carriage with portions broken away to disclose details of construction, 1

Figure 19, a detail in plan of the jack switch operating mechanism,

Figure 20, a agmentary detail partly in vertical section of the same, said section bein on the line 20-20 of Figure 19,

Figure 21, a bottom plan view of the reci rocating carriage,

igure 22, a fra mentary view showing the position and indicating the operation of the ack switch,

Flgure 23, a side elevation of the carrlage with portions broken away,

Figure 24, a detail in plan of the vertically moving cam controlling and actuating mechanism,

Figure 25, a detail end view of the same,

Figure 26, a; detail view of the opposite end of the same,

Figure 27, details showing different phases of operation of the vertically moving cam,

Figure 28, a bottom plan view in detail of the vertical cam,

Figure 29, a side view in partly vertical section on the line 29-29 of Figure 28,

Figure 30, a diagrammatic representation of a portion of the power circuit including circuit breaking stop means and Figure 31, a section on the line 31--31 of Figure 24.

Referring to the drawings, a machine embodying my invention may conveniently comprise a framework A supporting a fixed rear needle bed B and a front needle bed G preferably slidable both longitudinally and laterally (Figure 3), said needle beds being of the usual type with the needle grooves of one bed registering with cor- 101, said chain having a slotted member 102 adapted to receive and engage the free end 103 of a lever ivotally mounted on the carriage at 104 igpres 3 and 18). As shown more clearly in igures 1 and 2, the chain 101 is mounted on sprockets arranged at opposite ends of the machine, said sprockets being driven by a belt or other connection with the motor E. To effect the reciprocating motion of the carriage, means are provided for periodically reversin the direction of the current throu h t e armature of the motor thus reversing the direction of the chain 101. To accomplish this reversing operation automatically, 8. reversing switch is interposed in the power circuit. said switch being controlled by a double relay indicated at F in Figure 7 of the drawings, the opposed magnets of which are alternately energized at the end of each run of the carriage, the circuit being closed through suitable contacts mounted on the framework of the machine and on the carriage respectively. However, before reversing the current in the armature of the motor, it is desirable to reduce the current or otherwise impede the movement of the carriage so as to avoid harmful impact thereof at the ends of its course. As shown in Figure 7, the motor circuit includes the conductors 105 and 106, the latter of which contains a resistance 107 and also a parallel resistance or rheostat 108. Thus, to increase the resistance in the conductor 106, the rheostat 108 may be periodically cut out. This is conveniently accomplished by means of a relay including a magnet 109, and a bar 111 said magnet being in circuit with both magnets of the double relay F and also with the fixed contact R at one end of the machine, an adjustable contact R at the opposite end of the machine, and a movable circuit closing contact R mounted on the carriage D. For practical purposes, the magnet 109 and the double relay may operate substantially simultaneously. However, the action of the double relay may be eifectively delayed by making the bar 110 thereof heavier than the bar 111, Thus, the current in the motor E will be reduced either simultaneously with or just before the change of direction of the current therein.

In addition to the automatic features associated with the driving and stopping of the knitting machine, I have also provided automatic means for controlling and actuating in predetermined succession those parts of nation of electrical and mechanical arrangements which, are measurably simplerthan those commonly utilized for; a similar purpose in the knitting art and, at the same'time effect a highly deslrable uniformity and certainty of operation. ,The control apparatus,

according to my invention, coo crates with the driving mechanism in sue a manner that the necessary changes of the various parts are effected at the proper time to secure the desired design of fabric and also to prevent injury to the machine, the latterresult being accomplished through the instrumentality of suitable safety devices hereinafter to be. referred to in detail in connection with the movements with which they are more particularly associated. The general scheme of control includes a system of circuits each having one set of contacts which engage to close the circuit periodically and another set of contacts which engage according to a predetermined arrangement, so that no change is effected unless both sets of contacts are in engagement simultaneously. Referring to Figures 3 and 7 of the drawings, the periodically operating contacts are represented at H, J and K, the contacts H being fixed at one end of the machine, the contacts J being slidably mounted at the other end of the machine, so that the length of stroke of the carriage may be varied, and the contacts K being mounted on the carriage to reciprocate therewith. Thus, some of the contacts K engage all of the contacts H at each stroke toward the left end of the machine, while some of the contacts K engage all of the contacts J at each stroke toward the right end of the machine. All of the contacts H and J are in circuit with a rotating drum 201, the de tails of which are more clearly disclosed in Figures 9 to 11 inclusive. Intermittent movement is imparted to the drum 201 by suitable means connected with the reciprocating carriage and operated thereby. Thu-s, the carriage is provided with an upwardly projecting cam shaped member 202 (Figure 3) which moves in the path of a lever 203 (Figures 5 and 6) and deflects one end of said lever upwardly. This lever 203 is securely fastened to a rod 201 (Figure 3) journaled in the framework of the machine and having a lever, arm 205, Figure 5, secured at one end. A link 206 pivoted at 207 imparts a rocking motion to a shaft 209 upon which is secured a pawl carrier 208 (Figure 10). A pawl 210 mounted on carrier 208 is held by means of a. sprin 230 in engagement with a ratchet 211 which is operatively connected to the drum 201 and imparts intermittent movement to said drum of. the carriage.

to the' extent of one step during each stroke mountedv adjacent to the drum "201 and is provided with a plurality of perforations adapted to accommodate plunger contacts 213 normally pressed" toward the drum by means of springs 214. The carrier 212 is pivotally mounted at 215 and is connected to the pawl carrier 208 by means of a link 216. A spring 217 may be provided to hold the contact carrier normally in position to A contact carrier 212 is permit the plunger contacts 213 to engage the peripheral surface of the drum 201 through pattern controlling perforations hereinafter referred to, or, in the absence of perforations-toengage the surface of a pattern chart 218 arranged to cover the surface of said drum. A yielding detent 219 engages the ratchet 211 to prevent lost motion. As indicated in-Figure 9, the pattern chart 218 is provided with perforations 220 which receive corresponding sprocket projections 221 extending from the peripheral surface of the drum 201. The surface of the chart may be provided with transverse and longitudinal markings 231 and 232 respectively by which the pattern controlling perforations 222 and 223 may be more readily located and identified as to function. In the embodiment of my invention illustrated in the drawings, the pattern chart will move twice between each two of the perforations 220. In other words, the pattern chart will travel a distance equal to the distance between two perforations 220 during a complete oscillation of the carriage D, but the movement will take place in-two increments. Thus, a change perforation 222 occurring on the same transverse line with the perforations 220 will indicate a change to be effected at the end of a run of the carriage in one direction while a'chan e perforation 223 indicates a change to e effected at the end of a run of the carriage in the opposite direction.

In operation, the plunger contacts 213 normally bear yieldingly against the surface of the pattern chart 218 or against the drum 201 when the perforations 222 and 223 come into register with said plunger contacts, the latter in this position extending through said perforations, and, in each case, closing a circuit. The operation of rotating the drum takes place intermediate the ends of the carriage runs so that, when the carriage reaches one end or the other of its course, one or more pattern or otherchanges will take effect. depending upon the number and identity of perforations through which the plungers 213 are properly projecting into contact with the drum 201.

Simultaneously with the rotary movement of the drum'caused by movement of the pawl 210 I raise one end of the contact carrier 212 by means of the link 216 connected with fill lam

the pawl carrier 208 and against the tension resistance of the spring 217. This raising of the carrier elevates the contacts 213 out of engagement with the drum or the pattern sheet, as the case may be, and serves to prevent sparking at the points of the contacts 213 upon making and breaking contact with the drum, as well as to prevent possible injury to the pattern sheet by the dra ging of the points during rotation of the drum.

For convenience, the various change circuits may be identified on the pattern chart by number or by reference to the character of the change effected, or by both. Thus, as shown in Figure 9, the numbers 1 to 10 inclusive are intended to identify circuits which efiect operation of the jacquard change or that part of the knitting machine mechanism which controls to some extent the combining of the needles in certain relationships to produce patterns of predetermined appearance. Circuit 11 cooperates with what may be called a jack switch, the function of said switch being to throw all of the jacks out of operation prior to a readjustment of the needles through their corresponding jacks by means of the jacquard mechanism. The circuit marked 12 indicates a stop. However, in the present embodiment of my invention. this circuit is not complete because there is little reason for providing a predetermined stop in a full automatic machine except perhaps to indicate the completion of a given piece of knitted fabric. Ordinarily, the-operator observes when the pattern has been finished and stops the machine by hand. Circuits 13 and 14 are intended to control the racking mechanism. Circuits 15 and 16 control the operation of a vertically moving cam arranged on the carriage to produce what are known in the art as links links operation and flat operation, respectively. l lircuits 17 and 18 include magnets which cooperate with the stitch change mechanism to control the length of the stitch. The three positions herein provided for result in long, medium and short stitches, respectively. The circuits 19 and 20 control the yarn changes and are suflicient to permit the convenient use of three yarn or thread carriers in any. desired succession.

In machines of the flat bed type. it is desirable to provide for both links links and flat operation thus giving a wide variety to the fabric patterns which may be formed on the machine. For this purpose, I have included in the knitting machine embodying my invention suitable jack engaging members and means for controlling the longitudinal and vertical needle operating movement of the jacks. Referring to Figure 21, which shows the bottom surface of the cam carria cam surfaces 401 and 402 are arr to ride over portions of the jacks,

normally depressing the same into needle havin needle hook engaging ends are also provi ed in the grooves to engage, disengage, and move the needles accordm to the regu rements of the pattern of the itted fa IIG. Ad acent to the cam surface 401 13 a recessed ortion 403. A similar recessed portion 404 ies adjacent to the cam surface 402, said recessed portions ermitting the acks to move u out of need e engaging pos1t 1on. I t Wlll e noted that the fixed cams lglmg ad acent to the rear needle bed of t e machme will form a cam groove 405 whlle the fixed cams lying adjacent to the front needle bed will form a cam groove 406, said gropves cooperating in the well known way w1th the jack butts to move the acks forward and back in their correspondmg ooves in the needle beds. need es are positioned in one of the beds, they w1ll normally be in contact only with the acks belonging to that particular bed. However, where it is desired to interchan e the needles from one bed to another for t e purpose of changing the attern, or the appearance of the knitted abric, or for some other urpose, means may be provided to move t e needles in one bed toward the center and into such a position that under some circumstances the jacks in the opposite bed Wlll engage the free end of the needles to move the same immediately after the 'acks 1n the other bed have been disenga d t erefrom. This result may convenient y be controlled entirel from one side of the machine, prefers, ly b means of a suitable cam cooperating wit the jacks in the front bed. For this purpose, I have provided a vertically slidab e or plunger cam 407 adapted to project, when operative, into the cam groove 406. A similar] shaped fixed cam 408 forms a part of t e cam system cooperating with the rear bed of the machine and is equivalent to the cam 40? in ever respect exce t that it is not removable or a justable. us at every links passage of the carriage or movement toward the left, the cam 408 thrusts the jacks and the needles forward into such position that the needles can be en aged by jacks in the front bed if said jac s are thrust forward sufiiciently for the purpose. This is the function of the vertically slidable cam 407. When this cam is out of operation on links passage of the carriage, the jacks in the front bed do not engage the free end of the needles in the rear bed and therefore said needles are not drawn across into the front bed. However, when the cam 407 is moved into position in the cam slot 406, the jacks in the front bed are moved forward sufiiciently to engage When the the free ends of the needlesof the rear bed and said needles are withdrawn from said rear bed, but only when the carriage is moving in the direction indicated by the arrow. When moving in the oppositedirection, the same positionin of cam 407 will cause the needles in the the rearbed. The operations thus far referred to generally in connection with changes from links-links to flat and V109 verse are carried out in principle byI the knitting machines in common use.- owever, according to my invention, I prov de a novel and relatively simple and effective control over the movement of cam 407 so that changes in the position of said cam required by the pattern may be automatically and accurately brought about by electrlcal means.

Referring now to Figures 24 to 29 inclusive and 31, the cam 407 may be supported on a link 438 pivotally mounted on an eccentric crank in 409 projecting from the sur- 1 face of a disc 410, said disc being attached to a rotating armature associated with magnets 411, 412 and 413, said armature be ng indicated at 414 (Figure 24). Accord ng to the present construction, the mechanism controlling cam 407 is capable of three positions illustrated at X, Y and Z 1n.F1gure 27. The X position is brought about when coil 413 is energized, the Z position when coil 411 is energized, and the Y position when the flow of current is through 0011 412. The X and Z positions produce what is called fiat operation, while the Y position produces the links links operatlon or that positioning of the cam 407 which causes the needles to be shifted from one bed to the other. This mechanism is indicated diagrammatically in Figure 7 at M, in accordance with which, the circuit 15 controls magnet 411 but energizes said magnet only when the contact is closed at the left hand end of the machine or in the H grou of fixed contacts. A similar circuit 15 isc osed to energize magnet 413 when the carriage reaches the ri ht end of its run, assuming in each case that a corres onding perforation in chart 218 permits t e complete clos ing of the circuit through the control chart in the manner hereinabove explained generally. The ma net 412 may be energized at either end of t e course of the carriage and is connected with the circuit 16 which includes not only the conductors indicated diagrammatically in the drawing (Figure 7 but also a plurality of spring contacts 415,

416, and 41[.- A metallic insulated contact plate 418 is mounted to rotate on the same center as the disc 410 but at the opposite end of the rod or member supporting both said disc and the armature 414. The contact plate 418 has a sector shaped recess arranged to expose a surface 430 of fibrous ront bed to be moved into' or other insulating material underlyingthe plate and therefore in the path of the con" tacts 415 and 417, depending u on which of are in the osition shown in Figure 7 or in the links inks position, a perforation occurring in the control chart along the line of circuit 15 will close said circuit and thus energize one of the magnets 411 or 413. Assuming that the magnet 411 is energized and that the parts now assume the position Z of Figure 27, it will be clear that magnet 412 cannot be ener ized when the carriage is at the right hantf cause the contact 415 will be resting upon the surface 430 of the fibre insulating material underlyin the contact plate 418, even though a per oration occurs in the hue of the circuit 16. In order, therefore, to move the cam 417 back to links links osition, it

will be necessary to have a per oration in the circuit 16 occurring at such a place on the control chart that the circuit 16 will be completed at the left hand extremity of the course of the carriage. This arrangement is the coils is ener ized. Thus, w on the parts intended to eliminate the possibility of erroneous or untimely operation of the cam 407. When themachine operator discovers that a perforation has been misplaced and is thereore inoperative, as will be evidenced b a corresponding mistake in the resulting abric pattern, he may, on his trial run, indicate such errors and correct the pattern control chart by pasting up or otherwise closing the WI'OIIO perforation and also by inserting additional perforations in their correct places.

By reason of the'character of the o rations set in motion by the movement 0 cam 407, it has been found desirable to interpose safety devices in such a manner that, unless a proper predetermined movement of cam 407 takes place, further operation of the machine will be prevented. In other words, if cam 407 shou d failfor some reason to perform its function according to proper nit-ting practice, it is likely that serious injury might result to the machine if the succeeding operation were permitted to be initiated. Even if no injury came to the machine, it is possible that there would be an error in the knitted fabric. One of such safety devices is associated with the disc 410. Referring to Figures 7 and 26, this disc is shown with a plurality of peripheral notches or depressions 419, one notch being provided for each position of the contact plate 418, as indicated inFigure 27. A lever 420 pivoted at 421 has a roller 422 mounted at its free end and positioned to engage the peripheral surface of the disc 410, said roller being retained in yielding engagement with said surface by means of a spring 423. The lever 420 also carries adjacent to its free end a contact which is movable toward and away from a fixed contact 425. In operation when the disc 410 is rotated by reason of the energlzm of one of the magnets 411, 412 or 413, t e roller 422 rides up on the cylindrical surface of the disc and closes the contacts 424-425. However, as soon as the change is completed and the roller 422 comes to rest 1n contact with one of the notches or recesses 419, the contact 424-425 is again broken. These contacts may be included, in one of the circuits indicated diagrammatically in Figure 30, and any one of which, when closed, will break the power circuit through operation of the relay G. Thus, if for some reason the change of him of cam 407 from position Y to osition X should not be entire complete the roller 422 would still be m ing on the cylindrical peripheral surface of the disc 410 and the contact 424425 would be closed, thus ener ing the magnet 113 of relay G, and if al other settings and ad ustments were correct, the machine would stop and the safety signals would indicate an 1ncorrect functloning in connection with cam 407. Since the change hereinabove described takes place at the end of a run of the carriage, the momentary closing of contacts 424-425 in normal operation will produce no rceptible effect on the operation of the mac ine.

I have previously referred to the jacquard or the mechanism for grouping, according to a redetermined plan, the ]3.0kS in the rear need e bed in such a manner that some or all of said jacks may be thrown into operative needle engaging position in the1r respective grooves. Before a rearrangement takes place, however, it is necessary to move the disengaged jacks in the rear needle bed from working position toward the rear of the bed. Th s operation is accomplished by means of mechanism which I have identified generally in Figure 7 at N and which ma convenientl be referred to as the ac swit h mechanism, the mechanical features of which are more clearly shown in Figures 18 to 22 inclusive. Referring to Figure 22, the actual jack engaging portion of the mechan sm includes a switch or cam 501 interposed in the cam groove 405 in the path of the jack butts, said switch being secured to the lower end of a rod 502 (Figure 20), the u or end of which carries an armature 503 igure 19) positioned to cooperate with the core of a magnet 504. A yielding latch 505 engages flat surfaces of the armature 503 to retain said armature in on and oil positions, respectively. Referring now to Figure 7, the magnet 504 is energized through the circuit having the contacts 11, one of which is mounted on the reciprocating carriage of the machine, and the other of which is included in the oup of contacts J, or those positioned at t e rlght hand end of the machine. Thus, the energizing of magnet 504 can take lace only at one end of the machine and w en a perforation ocpath of the crank pin 409 on disc 410, Figure 26, and in engagement with said crank pin or a contiguous part only when cam 407 is in the or links links position. In all other positions, these contacts are out of engpgement and the jack switch circuit is open.

bviously a similarly effective movement of the cam 407 may be made by mechanical means or b hand. a

The mec ianical features of the jacquard mechanism are more clearl shown in Fig ures 12 to 17 inclusive. y means of the apparatus therein illustrated, the jack selecting or jack pushing members, arran ed in predetermine combinations on a suite is shaft or c linder, are rotated alternately in opposite irections until a particular combination is selected by the mechanism here inafter described and provided for the purpose. The shaft or cylinder carryingthe ack engaging or jack pushing members is also mounted to be moved toward the jacks after a given combination has been selected by the selecting mechanism.v Otherwise, the jack pushing members rotate as stated without being deflected toward the f'acks.f The it 0 jack jactpiard may comprise a plura pus ing members or pins 507, o uniform length and diameter and removabl positioned in a cylinder 508 having a p urality of rows of cylindrical recesses of suitable size and shape to receive and retain the ins 507. These ins are preferably provided with longitudinal slots at their lower ends so that, by making the pins and the recesses of substantially the same diameter", the latter will engage said recesses yieldingly and securely. In the embodiment of my lnvention under consideration, I accommodate ten arrangements of the pins 507 although it is obvious that additional and other arrangements can be made. The cylinder 508 is journaled in a pair of supports 509 and 510, said supports eing pivotally mounted on and tiltable with respect to suitable brackets supported by the framework of the machine. An extension 511 mounted u on one of said brackets secures one end 0 a spring 512, the other end of which is fastened to the support 510, thus normally holding the cylinder 508 and its supports away from the jacks. Rotary movement is transmitted to the cylinder 508 through a universal joint gages the free end of a spur shaft 516 journaled in a bracket 517 secured to the machine, and which carries on its driven end a gear 518, said gear meshing in turn with a pinion 519 mounted on a spur shaft 520 journaled in a portion of the machine and having at one end a sprocket 521 which is driven alternately in opposite directions b means of the power cha1n 101. Thus, wit the universal joint and sli connection between the shaft 516 and t e cylinder 508, motion of rotation alternately in opposite directions will be imparted to said cylinder except when said motion is interrupted by the selective stop means hereinabove referred to and to e described.

Referring now to Figures 12 and 13 and 14, the selective stop mechanism will include a plurality of pins 522, each arranged on cylinder 508 in ong'tudmal alignment with a corresponding row of pins 507. A plurality of armatures 523, one for each pin 522, are rotatabl mounted on a rod 524 in such a manner t at, when one of the coils 525 corresponding to a given armature is energized, said armature will be rotated around 524, thus deflecting a projecting detent ortion 526 into the path of the correspon in pin 522 which position will be mamtaine until the jacquard throwing mechanism has operated to effect a forward movement of the jacks lying in the ath of the pins 507 occurring in the selected row. The energizing of the coils 525 is effected through circuits numbered 1 to 10 inclusive and shown diagrammatically in Figure 8. Thus, when the pattern chart 218 turns a perforation into such position that one of the plunger contacts 213 will pro'ect through saidperforation and close t e circuit, the corresponding magnet 525 willbe energized and will move the proper detent into position to stop rotation of the cylinder 508, as here1nabove described.

After the pro or arrangement or group of pins 507 has en brought into position' by the selectin means described, 'acquard throwing or' ti ting mechanism wiil be actuated to move the jacquard toward the jacks of the rear needle bed and to push for ward some or all of said jacks into operative needle engagin position, according to the requirements 0 the pattern.

As heretofore described, the pin carrying cylinder 508 is mounted on a pair of supports 509 and 510, said sup orts being adapted to rock or tilt to move t e pins fora ward into jack en aging position at the proper time. As own in Figure 17, a

latch 527 is pivoted on the support 509 and has a portion adjacent to the core of the magnet 528. The forward or operative end of the latch is preferably of hook shape to engage a In 529 mounted on a toggle lever 530, one en 531 of which normally lies in the path of the cam 202, forming a part ofthe carria stroke of t e carriage to the left, the member 531 is pressed upwardly against the resistance of a spring 532 and the lug carrying end of lever 530 is deflected a corre sponding amount. If the coil 528 is inert the lug 529 will clear the end of the latch 527 and no tilting movement'of the cylinder 508 will result. However, if coil 528 is energized, a portion of latch 527 vacting as an armature will be moved into enga ement with the core of the magnet, thus de ecting the forward or hook end of the latch so that, when the carriage reaches the left hand end of the machine, the resulting movement of the members 531 and 530 will bring said latch into engagement with the lug 529 and the continuedforward movement of the member 530 will carry with it the cylinder 508 against resistance of the spring 512. When the direction of the carriage is reversed, the engagement between cam 202- and the member 531 will of course be broken and the parts will return to the inoperative position shown in Fi re 17.

Referring now to igure 8, it will be clear that the energizing of magnet 528 will depend on two factors; In the first place, said magnet will not be energized unless one of the coils 525 has been energized through operation of a suitable perforation occurring in one of the circuits numbered 1 to 10 inclusive. Furthermore, the coil 528 cannot be energized and the jacquard cannot be thrown forward unless the machine is operating links links or, in other words unless clrcuit 16 is closed. For this purpose, a double relay S is interposed in circuits 15 and 16, a magnet 540 being in circuit 15, and another magnet 541 being in the circuit 16y A stop 542 lies adjacent to magnet 540 while a live contact 543 lies adjacent to the magnet 541. Accordingly, when the machine iso crating flat, orwhen circuit 15 is closed, t e current carrying armature 544 of the relay S will engage the stop 542, thus leaving open the circuit which includes the magnet 528. However, if circuit 16 is closed, magnet 541 will be energized and the circuit of magnet 528 will be closed.

WVhere this closing of the circuit including ma et ,528 is coincident with a closing of the circuit through one of the circuits 1 to 10 inclusive, the jacquard will be actuated atthe proper time so that no injury willresuit to the machine or to the fabric throu h a possible mistake in the perforating of t e pattern chart.

D. Thus, at the'end of each 

